Statistical analysis was performed using the statistical
package SPSS 19.0 (SPSS, Inc., 2010). All values are reported
as mean ± standard deviation for each treatment group.
Analysis of variance (ANOVA) and Duncan’s test were performed
at the level of 5% to compare the mean of oxidative
properties (Table 2) and instrumental surface color
(Table 3). The difference in bacterial counts between the
ozone treatment and control groups (Table 1) was determined
using a paired sample t-test with a confidence interval
of 95% (P < 0.05).